The diagram provided here shows the reactants and the products of a common chemical reaction. The line on the graph behind them represents the energy of a system as the reaction progresses. Which of the following conclusions is best supported by the information provided? O Because there was a change in energy, the equation must not be balanced
O the overall mass of the system increased when the reaction occurred
O This reaction required the addition of energy from the surroundings
O During the reaction the energy was converted to mass, and, therefore, was lost

Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. • the maximum solubility of b in a is 4 wt% b, which occurs at 420c. • the solubility of b in a at room temperature is 0 wt% b. • one eutectic occurs at 420c and 18 wt% b–82 wt% a. • a second eutectic occurs at 475c and 42 wt% b–58 wt% a. • the intermetallic compound ab exists at a composition of 30 wt% b–70 wt% a, and melts congruently at 525c.• the melting temperature of metal b is 600c. • the maximum solubility of a in b is 13 wt% a, which occurs at 475c. • the solubility of a in b at room temperature is 3 wt% a.

Ineed with my science work! it’s due tomorrow!

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?